.nav-bottom {
    #word {
        background-image: url(../image/word-press.png);
    }
}
.book-name {
    text-align: center;
}
ul {
    margin-top: (30/750)*100vw;
    display: flex;
    width: 100vw;
    li {
        flex: 1;
        text-align: center;
        background-color: #fff;
        border-bottom: #000 solid (3/750)*100vw;
        border-top: #000 solid (3/750)*100vw;
        border-right: #000 solid (3/750)*100vw;
        font-weight: 600;
        &:last-child {
            border-right: none;
        }
    }
}
.select {
    border-bottom: none;
    background: #F4F4F4;
}
.iword {
    display: inline-block;
    margin:  (10/750)*100vw;
    padding-right:  (3/750)*100vw;
    padding-left: (3/750)*100vw;
    background-color: rgb(192, 181, 181);
}
.cover {
    position: fixed;
    top: 0;
    left: 0;
    background: rgb(0,0,0);
    opacity: 0.7;
    width: 100vw;
    height: 100%;
}
.word-detail {
    position: fixed;
    top: (100/750)*100vw;
    left: 5vw;
    width: 90vw;
    height: 120vw;
    border-radius: (10/750)*100vw;
    overflow: hidden;
    background-color: #fff;
    .top {
        font-size: (40/750)*100vw;
        background-color: #007accb6;
        .loudspeaker {
            display: inline-block;
            width: (30/750)*100vw;
            height: (30/750)*100vw;;
            background-image: url(../image/loudspeaker.png);
            background-size: 100%;
        }
    }
    .title {
        margin: 0 (10/750)*100vw 0 (10/750)*100vw;
    }
    .close {
        margin: auto;
        display: inline-block;
        float: right;
        width: (50/750)*100vw;
        height: (50/750)*100vw;
        background-image: url("../image/close.png");
        background-size: (50/750)*100vw;
    }
    .content {
        font-size: (34/750)*100vw;
        div {
            margin: (20/750)*100vw;
        }
        .example-title {
            margin: (20/750)*100vw 0 0 (10/750)*100vw;
            font-size: (25/750)*100vw;
            font-weight: 600;
            color: #ada9a9;
        }
        .example {
            // display: block;
            margin-top: (20/750)*100vw;
        }
    }
    .button {
        display: flex;
        position: absolute;
        bottom: 0;
        width: 100%;
        height: (70/750)*100vw;
        >span {
            display: inline-block;
            text-align: center;
            flex: 1;
            padding: (10/750)*100vw;
            background: #49A0DB;  
            border-right: #000 solid (2/750)*100vw;
        }
        .familiar {
            border-right: none;
        }
    }
}